I know there have been a number of users who haven't been able to get root again after the March 2, 2012 update.

Here are the instructions:
1) Download the package ZergRush-forKobo.zip
2) Extract the files from the package
3) Make a new folder in your user profile ( %USERPROFILE% ) and call it .android
4) Copy the file adb_usb.ini to the new .android folder
5) On the Kobo: Turn on USB Debugging under the development options
6) Connect the Kobo to the Windows PC
7) Go into Device Manager, and double-click on the K080 device, it should be listed under unknown. Choose "Update Driver" and pick "Let me choose a driver for this device", point it to the usb_driver package (in my instance I extracted the package to C:\temp, so my full path name was C:\temp\ZergRush-forKobo\usb_driver ). A list of devices will appear, choose ADB Interface
8) Restart the computer
9) Open up the zergrush runme.bat script and let it do it's magic, in my instance it was C:\temp\ZergRush-forKobo\zergrush\runme.bat
10) Install OogleVox
11) Donate!

If you are having problems with the driver installation, I have included some scripts in my ZergRush-forKobo zip.

On XP, please try running uninstalldriver_xp.cmd this should clear out the Kobo specific driver for you. If you are still having troubles after the script, delete the infcache.1 file in c:\windows\inf ( you need to enable hidden files in windows to see the file). UNDER NO CIRCUMSTANCES IN WINDOWS VISTA OR WINDOWS 7 DELETE INFCACHE.1. Windows XP will automatically recreate the file, Vista and higher will not.

On Windows Vista or Windows 7 (or higher), please use uninstalldriver_win7.cmd to clear our the specific driver for you.

Both scripts require administrative rights. Once you have run the script, please restart your computer before proceeding with step 6 again.

This IS a new version of the download that contains these new script, please use this new zip instead of the old one.

03/11/2012, 10:47PM EDT:
I've updated the uninstall script for Windows 7 and included the modded version of the USB driver (as a different folder) in the package. If you are having troubles with the original USB driver, try the usb_driver_modded instead.

03/12/2012, 10:52AM EDT:
I've taken a video of how to "force install" the driver for those who are wondering, you can view it here:

Excellent, we are at exactly where we should be. You need to specify the driver for windows at this point. So, finish the wizard, go to the properties of the K080, then say update driver. Dont let windows automaticaly find the driver, you need to specify the folder C:\temp\ZergRush-forKobo\usb_driver. Windows might say the driver isn't compatible so you have to force in the ADB interface driver.

It probably isn't necessary, but it makes it easier to install the drivers since you can simply tell Windows to search in a particular directory and it will figure out everything else for you.

I have a feeling this might have been what got us into the mess in the first place... That's why I'm avoiding it for now

If you compare the output from the output in the update thread, it has the same information in it, whereas my functioning installation doesn't have any remarks to this in any of my INF files, so I'm just keeping that out of the loop at this point.

Excellent, we are at exactly where we should be. You need to specify the driver for windows at this point. So, finish the wizard, go to the properties of the K080, then say update driver. Dont let windows automaticaly find the driver, you need to specify the folder C:\temp\ZergRush-forKobo\usb_driver. Windows might say the driver isn't compatible so you have to force in the ADB interface driver.

How do you "force in the ADB interface driver"?
When I choose the usb_driver, windows gives a message saying:

"The specified location does not contain information about your hardware"